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Observation of the heavy baryons Σb and Σb*

Abstract:
We report an observation of new bottom baryons produced in pp̄ collisions at the Tevatron. Using 1.1fb-1 of data collected by the CDF II detector, we observe four Λb0π± resonances in the fully reconstructed decay mode Λb0→Λc+π-, where Λc+→pK-π+. We interpret these states as the Σb(*) ± baryons and measure the following masses: mΣb+=5807.8-2.2+2. 0(stat.)±1.7(syst.)MeV/c2, mΣb-=5815.2±1.0(stat.)±1. 7(syst.)MeV/c2, and m(Σb*)-m(Σb)=21.2-1.9+2.0(stat.)-0.3+0. 4(syst.)MeV/c2. © 2007 The American Physical Society.

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Authors


Aaltonen, T More by this author
Abulencia, A More by this author
Adelman, J More by this author
Affolder, T More by this author
Akimoto, T More by this author
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Journal:
Physical Review Letters
Volume:
99
Issue:
20
Publication date:
2007-11-12
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:c9cdaa38-a3a7-4603-9179-4ca0a10b1b2e
Source identifiers:
117348
Local pid:
pubs:117348
Language:
English

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